Cylinder Blocks
Printed marks appear on the stamp margin (selvedge). Blocks of stamps with the marks printed on the selvedge are popular with collectors.
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Cylinder Numbers Numbers in the margins of stamps printed by photogravure from rotary cylinders. A separate number appears for each different color used in multi-colored stamps.
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Cylinder: A curved printing plate used on a modern rotary press. The plate has no seams. For United States stamps, cylinders are used to print gravure stamps. See also Sleeve.
Cylinder Number - The number in the margins of a sheet of stamps that identifies the cylinder which has been used in the production process.
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Cylinder: A plate used on a modern rotary press. The plate has no seams. For United States stamps, cylinders are used to print photogravure stamps. See also Sleeve.
Cylinder - 1.) the drum-like part of a rotary printing press, also called a mandrel, to which curved printing plates are attached. 2.) the seamless curved plate used on a press to print gravure stamps.
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A steel cylinder bearing a raised image taken from an engraved master die, used to transfer a single original intaglio design to the multiple-subject printing plate.
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[edit] The Cylinder Mould Process
Another type of watermark is called the cylinder mould watermark. A shaded watermark, first used in 1848, incorporates tonal depth and creates a greyscale image.
Retouch: 1: correction done by hand-engraving on the plate or cylinder 2: flaws corrected on photogravure stamps 3: repairs to a flaw that resulted from an alteration or repair.
Cylinder - The cylinder used to print photogravure postage stamps. In many cases the cylinder is numbered and is large enough to print two PO sheets of stamps simultaneously.
Near the end of this endless screen there is suspended a hollow cylinder called a "dandy roll," the purpose of which is to squeeze more water from the pulp.
This is where the flat printing plate was curved around a cylinder and the two ends of the plate came together. The small space between the ends of the printing plate captured and then printed ink on the stamps.
So-called incisions are etched into a copper-lined cylinder and filled with printing colour. Given the different depth of these incisions, the required amount of colour for light and dark areas can be controlled.
Used to describe precancelled coil pairs where the gap between the ends of the lines showing the joining of the two halves of the precancel printing cylinder coincides with the line produced during the printing of the stamp themselves.
Recess printing - strictly speaking, any process where the inked image is below the plane surface of the plate, block, or cylinder; but in modern philatelic parlance refers to the present-day machine-printed, ...
And it is cut in scissors for sale. Jacob Perkins invented the D cylinder press. It was the original printing press for the first postage stamp. It was patented in 1819 and was on display at the British Library in London.
This roll is a soft steel cylinder and is placed in a transfer press to be rolled, or rocked, under extreme pressure over the die. A die, when placed on a device such as a transfer roll, is often referred to as a roller die.
Plate: The basic printing unit on a press used to produce stamps. Early stamps were printed from flat plates. Curved or cylindrical plates are used for most modern stamps. See also Cylinder and Sleeve.
Joint lines - lines that appear on gutters between sheets in rotary press printing and are caused by ink filling the space where the edges of the curved plates meet when mounted on the press cylinder ...
 See also: Stamp, Printing, Used, Plate, Sheet
  
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